From: nobu@...
Date: 2016-02-26T01:01:25+00:00
Subject: [ruby-core:73995] [Ruby trunk Bug#9810] Numeric#step behavior with mixed Float, String arguments inconsistent with documentation

Issue #9810 has been updated by Nobuyoshi Nakada.

Description updated

[Developers' meeting log][1]
> This issue is because of invalid type, not mismatch the number of arguments.
> Comparison `String` with `Numeric` should raise `TypeError`
> 
> matz: I once thought type mismatch also infringe the contract of arguments, therefore it can be `ArgumentError` but now they should be separated.
> 
> matz: It should raise `TypeError`.

[1]: https://docs.google.com/document/d/1rj7ODOCSfcsQeBd6-p-NiVwqxDUg05G66LwDOkKOGTw/pub


----------------------------------------
Bug #9810: Numeric#step behavior with mixed Float, String arguments inconsistent with documentation
https://bugs.ruby-lang.org/issues/9810#change-57146

* Author: Brian Shirai
* Status: Assigned
* Priority: Normal
* Assignee: Nobuyoshi Nakada
* ruby -v: ruby 2.1.1p76 (2014-02-24 revision 45161) [x86_64-darwin13.0]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
The `Numeric#step` documentation states:

"If any of the arguments are floating point numbers, all are converted to floats..."

https://github.com/ruby/ruby/blob/trunk/numeric.c#L1921

Is the following code intended to be described by that documentation?

```ruby
1.1.step(5.1, "1") {}
```

Previously (eg 2.0.0) resulted in a `TypeError`:

```
$ ruby -v -e 'p 1.1.step(5.1, "1") {}'
ruby 2.0.0p247 (2013-06-27) [x86_64-darwin13.0.1]
-e:1:in `step': no implicit conversion to float from string (TypeError)
	from -e:1:in `<main>'
```

In 2.1.1, at least, an `ArgumentError` is raised:

```
$ ruby -v -e 'p 1.1.step(5.1, "1") {}'
ruby 2.1.1p76 (2014-02-24 revision 45161) [x86_64-darwin13.0]
-e:1:in `>': comparison of String with 0 failed (ArgumentError)
	from -e:1:in `step'
	from -e:1:in `<main>'
```

What's the intended behavior?


---Files--------------------------------
0001-Update-documentation-on-Numeric-step.patch (1.11 KB)


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